CN107490107A - A kind of dew point indirect evaporative cooling air conditioning group for preparing cold water and cold wind - Google Patents

Abstract

The invention discloses a dew point indirect evaporative cooling air conditioner unit for preparing cold water and cold air, which includes a housing, and a fresh air outlet is arranged on the side wall of the housing, and a filter, a fan, and a dew point indirect evaporative cooling are arranged in the new air outlet in sequence according to the direction of air flow. unit, packed tower and air outlet, and the top of the packed tower is also provided with an air outlet. The air conditioning unit of the present invention combines dew point evaporative cooling with water cold storage technology, prepares cold water at night when the electricity price is low, supplies cooling and prepares cold air during the day, not only realizes the integration of cold water preparation and cold air, but also makes full use of dry air energy and water cold storage Technology, not only reduces operating costs, but also is green, healthy, environmentally friendly and energy-saving, and has very good practical value.

Description

A dew point indirect evaporative cooling air conditioning unit for preparing cold water and cold air

technical field

The invention belongs to the technical field of air-conditioning equipment, and in particular relates to a dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air.

Background technique

Nowadays, people spend about 60-80% of their time in buildings every day, and with the continuous improvement of people's living standards, the public has higher and higher requirements for the comfort of air-conditioned areas in buildings. The existing traditional mechanical refrigeration and air-conditioning methods meet the requirements of high comfort at the expense of consuming a large amount of high-quality energy, and the refrigeration machine room in the air-conditioning system occupies a large space in the building, and its intricate transmission and distribution pipelines bring difficulties to construction, fire protection and operation management. Great inconvenience.

Contents of the invention

The object of the present invention is to provide a dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air, which solves the problems of high cost, energy waste and large space occupation of the existing air-conditioning units.

The technical solution adopted in the present invention is a dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air, including a housing, a fresh air outlet is arranged on the side wall of the housing, and a filter and a fan are arranged in the new air outlet according to the direction of air flow. , dew point indirect evaporative cooling unit, packed tower and air outlet, and the top of the packed tower is also provided with an exhaust outlet.

The present invention is also characterized in that,

The dew point indirect evaporative cooling unit includes a cross-flow heat exchanger core. A water collection tank is installed at the bottom of the cross-flow heat exchanger core. The water collection tank is connected to a water supply pipe, and the water supply pipe is connected to the top of the cross-flow heat exchanger core. For the water distributor a, the water supply pipe is also provided with a dew point side water processor and a dew point side circulating water pump.

The water distributor a includes a water distribution pipe a connected to the water supply pipe, and a number of dew point side nozzles are evenly distributed on the water distribution pipe a.

The packing tower includes a core body. A water storage tank is installed at the bottom of the core body. The cold water storage tank is respectively connected with the cold water supply pipe and the packing tower return pipe. The packing tower return pipe is connected to the water distributor b on the top of the core body, and the water distributor b There is an air outlet at the top, and a packing tower circulating water pump and a packing tower water processor are also arranged on the packing tower return pipe.

The water distributor b includes a water distribution pipe b connected to the return pipe of the packed tower, and a number of nozzles of the packed tower are evenly distributed on the water distribution pipe b.

An exhaust fan is arranged in the air exhaust port.

A partition is also arranged between the core body and the cold water storage tank.

A fresh air valve is arranged in the fresh air port.

An air supply valve is arranged in the air supply port.

The fan is a press-in variable frequency fan.

The beneficial effects of the air-conditioning unit of the present invention are:

a) The air conditioning unit of the present invention integrates the preparation of cold water and the preparation of cold air, which can serve as a chiller and an air handling unit, making the air conditioning system more compact, reducing transmission and distribution losses, and improving the degree of industrialization;

b) The air conditioner unit of the present invention uses the dew point indirect evaporative cooling principle to prepare cold air, and wet-cools the air below its wet-bulb temperature, breaking the limitation that the air can only be wet-cooled to its wet-bulb temperature, and fully utilizes the cooling technology of evaporative cooling potential;

c) The air conditioning unit of the present invention passes the cold air prepared by the dew point indirect evaporative cooling unit through the heat and humidity treatment of the packed tower, and then enters the packed tower and pours water on the top for countercurrent heat and mass transfer, and the secondary air discharged outside is first passed by the water distributor a After isenthalpic humidification and cooling treatment, the heat and mass exchange is introduced into the packed tower, which not only avoids energy waste, realizes effective and cascaded utilization of energy, but also improves the heat and mass exchange efficiency in the packed tower, realizing energy saving, environmental protection, green and healthy Cold water treatment method;

d) The air-conditioning unit of the present invention prepares cold water at night and combines it with the concept of water cold storage, utilizes the peak-valley electricity price difference of the power grid, stores cold at night, and provides cooling during the day, which can shift peaks and fill valleys, and has high economic benefits.

Description of drawings

Fig. 1 is a structural schematic diagram of a dew point indirect evaporative cooling air conditioning unit for preparing cold water and cold air according to the present invention.

In the figure, 1. Fresh air outlet, 2. Fresh air valve, 3. Filter, 4. Fan, 5. Shell, 6. Cross-flow heat exchanger core, 7. Water collection tank, 8. Dew point side water processor , 9. Dew point side circulating water pump, 10. Water supply pipe, 11. Dew point side nozzle, 12. Water distribution pipe a, 13. Core body, 14. Water distribution pipe b, 15. Filled tower nozzle, 16. Air outlet, 17. Exhaust fan, 18. Filled tower circulating water pump, 19. Packed tower water processor, 20. Water storage tank, 21. Air supply port, 22. Air supply valve, 23. Partition, 24. Cold water supply pipe, 25. Primary air , 26. Secondary air, 27. Filled tower return pipe.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air according to the present invention, as shown in Figure 1, includes a housing 5, and a fresh air outlet 1 is arranged on the side wall of the housing 5, and inside the fresh air outlet 1, there are arranged in sequence according to the direction of air flow Filter 3, fan 4, dew point indirect evaporative cooling unit, packing tower and air supply port 21, the top of the packing tower is also provided with an exhaust port 16, and fan 4 is a press-in variable frequency fan.

The dew point indirect evaporative cooling unit includes a cross-flow heat exchanger core 6. A water collection tank 7 is arranged at the bottom of the cross-flow heat exchanger core 6. The water collection tank 7 is connected to a water supply pipe 10, which is connected to the cross-flow heat exchanger. The water distributor a on the top of the heat exchanger core 6 is also provided with a dew point side water processor 8 and a dew point side circulating water pump 9 on the water supply pipe 10; the water distributor a includes a water distribution pipe a12 connected to the water supply pipe 10, and A number of dew point side nozzles 11 are evenly distributed on the water pipe a12. The circulating water pump 9 on the dew point side provides power, and the circulating water in the water collection tank 7 is descaled and purified through the dew point side water processor 8, the water supply pipe 10, the water distribution pipe a12 and the dew point side nozzle 11 for spraying operation, and the circulating water passes through the fork flow After the type heat exchanger core 6 cools the fresh air, it falls back to the water collecting tank 7 inside.

The packed tower includes a core body 13, and the bottom of the core body 13 is provided with a cold water storage tank 20, and the cold water storage tank 20 is respectively connected with a cold water supply pipe 24 and a packed tower return pipe 27, and the packed tower return pipe 27 is connected to a cloth at the top of the core body 13. Water dispenser b, the top of the water distributor b is provided with an air outlet 16, and the packing tower return pipe 27 is also provided with a packing tower circulating water pump 18 and a packing tower water processor 19; The water distribution pipe b14 has a number of packed tower nozzles 15 evenly distributed on the water distribution pipe b14. The power is provided by the circulating water pump 18 of the packed tower, and the circulating water in the water storage tank 20 is descaled and purified through the packed tower water processor 19, sprayed by the packed tower return pipe 27, the water distribution pipe b14 and the packed tower nozzle 15, and evaporated indirectly through the dew point The air treated by the cooling unit exchanges heat with the circulating water, and is discharged through the air outlet 16 and the air supply port 21 respectively. The cold water supply pipe 24 provides the low-temperature circulating water in the water storage tank 20 to the user.

An exhaust fan 17 is arranged in the air outlet 16, and the exhaust fan 17 promotes the flow of air at the air outlet 16.

A partition 23 is also provided between the core body 13 and the cold water storage tank 20 .

A fresh air valve 2 is arranged in the fresh air port 1, and the fresh air valve 2 controls the opening and closing of the fresh air port 1.

An air supply valve 22 is arranged in the air supply port 21, and the air supply valve 22 controls the opening and closing of the air supply port.

The working process of the air conditioning unit of the present invention:

When the cold water preparation mode is turned on, cold water is prepared at night at low electricity prices and stored in the water storage tank 20 for cooling when cold water is needed; the fresh air valve 2 is opened, and outdoor fresh air enters the casing 5 through the fresh air port 1 , the fresh air is filtered through the fresh air filter 3 in turn, and the fan 4 provides power to enter the dew point indirect evaporative cooling unit, wherein the primary air 25 flowing out of the cross-flow heat exchanger core 6 realizes equal humidity cooling treatment, and the air temperature approaches its dew point temperature The secondary air 26 is discharged from the top of the core body 6 of the cross-flow heat exchanger, and a direct evaporative cooling process occurs with the circulating water sprayed by the dew point side nozzle 11, and the secondary air 26 is treated with equal enthalpy humidification and cooling, and the primary air 25 And the secondary air 26 enters the packed tower, and the circulating water sprayed with the packed tower return pipe 27 undergoes countercurrent heat and moisture exchange in the packed tower 12, so that the temperature of the circulating water is reduced to close to the dew point temperature of the primary air 25, and falls back to the water In the cold storage water tank 20, when the user side needs cold water, the cold water supply pipe 24 is used to supply cooling to the user. At this time, the exhaust fan 17 and the air supply valve 22 are turned on, the primary air 25 is discharged from the air supply port 21, and the secondary air 26 is discharged from the exhaust port 16 out.

When the cold air preparation mode is turned on, the fresh air valve 2 is opened, and the outdoor fresh air enters the casing 5 through the fresh air port 1, passes through the fresh air filter 3 to filter the fresh air, and the fan 4 provides power to enter the dew point indirect evaporative cooling unit, and the dew point side nozzle 11 After heat exchange occurs in the sprayed circulating water, the secondary air enters the packed tower from the top of the core body 6 of the cross-flow heat exchanger, and the primary air 25 enters the packed tower directly in the horizontal direction; The fan 17 and the secondary air 26 are discharged through the air outlet 16, and the air is supplied to the area where the temperature of the indoor air conditioner is not high. The air supply port 21 is sent into the air-conditioning area to complete the mode of preparing cold air.

The air conditioning unit of the present invention combines dew point evaporative cooling with water cold storage technology, prepares cold water at night when the electricity price is low, supplies cooling and prepares cold air during the day, not only realizes the integration of cold water preparation and cold air, but also makes full use of dry air energy and water cold storage Technology, not only reduces operating costs, but also is green, healthy, environmentally friendly and energy-saving, and has very good practical value.

Claims (10)

1. A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold wind, characterized in that it comprises a housing (5), the side wall of the housing (5) is provided with a fresh air outlet (1), and in the fresh air outlet (1) according to A filter (3), a fan (4), a dew point indirect evaporative cooling unit, a packed tower and an air supply port (21) are arranged in sequence in the air flow direction, and an air exhaust port (16) is also arranged at the top of the packed tower. 2. A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air according to claim 1, wherein the dew-point indirect evaporative cooling unit comprises a cross-flow heat exchanger core (6), and the cross-flow The bottom of the heat exchanger core (6) is provided with a water collection tank (7), the water collection tank (7) is connected to the water supply pipe (10), and the water supply pipe (10) is connected to the cross flow heat exchanger core (6) For the water distributor a at the top, the water supply pipe (10) is also provided with a dew point side water processor (8) and a dew point side circulating water pump (9). 3. A dew point indirect evaporative cooling air conditioning unit for preparing cold water and cold air according to claim 2, characterized in that, the water distributor a includes a water distribution pipe a (12) connected to the water supply pipe (10) , a number of dew point side nozzles (11) are evenly distributed on the water distribution pipe a (12). 4. A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air according to claim 1, characterized in that, the packed tower includes a core (13), and a water storage tank is arranged at the bottom of the core (13) (20), the cold water storage tank (20) is respectively connected to the cold water supply pipe (24) and the packing tower return pipe (27), and the packing tower return pipe (27) is connected to the water distributor b at the top of the core body (13), An air outlet (16) is arranged on the top of the water distributor b, and a packed tower circulating water pump (18) and a packed tower water processor (19) are also arranged on the packed tower return pipe (27). 5. A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air according to claim 4, characterized in that, the water distributor b includes a water distribution pipe b (14) connected to the return pipe (27) of the packing tower ), some packed tower nozzles (15) are evenly distributed on the water distribution pipe b (14). 6. A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air according to claim 4, characterized in that an exhaust fan (17) is arranged in the air exhaust port (16). 7. A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air according to claim 4, characterized in that a partition ( twenty three). 8 . The dew point indirect evaporative cooling air conditioner unit for preparing cold water and cold air according to claim 1 , characterized in that, a fresh air valve ( 2 ) is arranged in the fresh air outlet ( 1 ). 9. A dew point indirect evaporative cooling air conditioner unit for preparing cold water and cold air according to claim 1, characterized in that an air supply valve (22) is arranged in the air supply port (21). 10. A dew-point indirect evaporative cooling air-conditioning unit for preparing cold water and cold air according to claim 1, characterized in that, the fan (4) is a press-in variable frequency fan.